Grand Hyatt, Tokyo

This 389-room midtown hotel is part of the lively Roppongi Hills complex (often dubbed a "city within a city"), crammed with hundreds of luxury boutiques, cafes, and a multiplex theater, open through the night on weekends. Rooms are generously appointed with mahogany furnishings, Frette linens, limestone baths, and soft, cotton yukata robes, customarily worn after bathing. Seven in-house restaurants include everything from an upscale take on teppanyaki to a charming patisserie, Fiorentina, helmed by the 2009 World Chocolate Master, Shigeo Hirai. If you fancy an evening in, drop by the 4th-floor bar, Maduro, where you'll enjoy live music and a specialty whiskey room, stocked with rare brands like Caol Ila and W.L. Weller.